topic Re: Different channels seen using show ascp neighbour. in Aerohive Migrated Content

Different channels seen using show ascp neighbour.

steven_rous — Tue, 21 May 2019 15:37:29 GMT

Edited text files show apparent mismatch between two APs one the Mesh Portal and the other the Meshed AP. Note. I've removed some details and replaced with ... ?

It would appear that both APs are using Channel 112 for the Wifi1 Backhaul link and when we run a show hive <hive id> neighbour command they apparently are seeing each other on Channel 112.

When however I run the show ascp neighbour command the Mesh Portal apparently is seeing the Meshed AP on Channel 132 and not 112? I'm wondering whether this is correct or a bug. And if not a bug how this can be correct.

Re: Different channels seen using show ascp neighbour.

samantha_lynn — Thu, 23 May 2019 04:06:14 GMT

Thank you for that data. To begin with, when we deploy Mesh, we need to set static channels on the APs involved in the Mesh chain, so that all devices are sure to use the same channel at all times. Additionally, those commands you ran, the output for those commands is based on data gathered during a background scan, could you run "show int wifi0" and "show int wifi1" and share the results (either here or with me directly at communityhelp@aerohive.com) so we can make sure background scans are going through properly?

Re: Different channels seen using show ascp neighbour.

steven_rous — Thu, 23 May 2019 17:18:59 GMT

Sam, Thanks for your reply. Please note the Mesh connection show is up and working. I've attached the output requested from both APs in a word document attached. Note ensure you view this as A3 Landscape if it doesn't automatically open that way! As you will see from output attached both interfaces are reporting to be working on Channel 112 and this has not been configured using static channels. We have a total of 15 other similar installations working like this and I've seen the reported mismatch elsewhere on other working Mesh connections too. Personally I think the output from the show ascp neighbour is wrong and therefore possibly a bug because I don't see how the Mesh Portal can see the Mesh AP on Channel 132 when clearly the neighbors are being seen on channels 112 which matches the output of the show wifi1 also. I did wonder about setting static channels to form a mesh connection recently when it took a long time for us to establish a Mesh connection at another site. I think setting it to static would speed up this process but is not absolutely necessary in order for this to work correctly and I would have thought where possible it is better to allow the APs to dynamically allocate channels and strength rather than try and configure this statically? The only I'm aware of that hasn't been configured as per documentation is the Eth0 Interface on the Mesh AP which has been configured as Backhaul but it shows as being down anyway because it connects to a physical POE injector and not a LAN switch. We are not trying to propagate or bridge VLANs over this link to another switch I think this is fine and not an issue either.

Re: Different channels seen using show ascp neighbour.

samantha_lynn — Thu, 23 May 2019 19:44:29 GMT

Thank you for that output, we are getting background scans through which is good news. For setting the channels statically, it isn't strictly necessary, the Mesh connection will form without it, but it's highly recommended so we can be sure the APs are using the same channel to communicate. To see if this is a bug I'm going to have to do some testing in my lab, I'll keep you updated with what I find. I appreciate your patience in the mean time.

Re: Different channels seen using show ascp neighbour.

steven_rous — Mon, 17 Jun 2019 18:32:00 GMT

Hi Sam, just wondering whether you've managed to replicate this problem. It's quite unique in as much as I've only seen this issue on Mesh Links.

Re: Different channels seen using show ascp neighbour.

samantha_lynn — Mon, 17 Jun 2019 20:01:30 GMT

Hi Steven, thank you for your patience, I'm sorry for the delay here. I've been trying to test this in my lab but I'm having some fairly large issues with Mesh in my lab right now, so I think it would be the best use of your time for you to open a case at this point. I see your account has partner support, so you'd want to contact your partner for this. If you're not sure who to reach out to for your partner, I can email you some contact information directly.

Re: Different channels seen using show ascp neighbour.

steven_rous — Thu, 27 Jun 2019 03:51:32 GMT

Hi Sam, if you could mail out details that would be helpful. Thank You.

Re: Different channels seen using show ascp neighbour.

samantha_lynn — Thu, 27 Jun 2019 04:07:51 GMT

I've emailed that to you now, please let me know if you have any further questions.

Re: Different channels seen using show ascp neighbour.

reinhardg — Fri, 28 Jun 2019 19:35:42 GMT

Hello Steven, hello Sam,

the wrong detection or display of channels not only is the case with meshed APs. We mentioned this also with APs which only are used for client access. We've also seen that one AP sees the BSSID of another AP twice: one time in the 2.4GHz band, another time in the 5GHz band. I'm afraid that the selection of the best channel is affected when channels don't become discovered correctly.

And something else sometimes is wrong: SSIDs appear as empty/hidden although they definitely become broadcasted.

We already raised a ticket at our partner support - however, we are waiting since more than three months for a feedback.

Re: Different channels seen using show ascp neighbour.

samantha_lynn — Fri, 28 Jun 2019 20:24:13 GMT

Could you share the case number with me so I can follow up to see why you haven't received a reply? If you'd rather share this with me directly, my email is communityhelp@aerohive.com.

Re: Different channels seen using show ascp neighbour.

reinhardg — Mon, 01 Jul 2019 14:29:03 GMT

Hi Sam,

I'm sorry, but I have no case number. I assume that our partner (RedNet AG in Germany) didn't forward this problem to Aerohive support. I asked several times for a status update, but didn't get an answer.

Re: Different channels seen using show ascp neighbour.

samantha_lynn — Mon, 01 Jul 2019 20:04:10 GMT

Thank you for explaining, my apologies for the lack of responses. Could you forward the email chain to communityhelp@aerohive.com so I can follow up for you internally? I will find an SE for you to speak with and I'll stay in contact with you to make sure you get timely responses moving forward.